Flight crew of A319 reports following a TCASII RA after msp tower misjudged the spacing between them and another aircraft intending to use the same runway.

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Attributes
ACN	592210
Time
Date	200309
Day	Tue
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : msp.airport
State Reference	MN
Altitude	agl single value : 3000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : m98.tracon
Operator	common carrier : air carrier
Make Model Name	A319
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	approach : traffic pattern approach : visual
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : m98.tracon
Operator	common carrier : air carrier
Make Model Name	DC-9 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	592210
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : airborne critical non adherence : required legal separation
Independent Detector	other controllerb
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Supplementary
Problem Areas	Airport Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error Inter Facility Coordination Failure

Narrative:

On base to runway 12R, msp called runway in sight. Notified of DC9 traffic at 1 O'clock position on 1 mi final to runway 12R. Reported traffic insight. Cleared visual approach runway 12R. A few seconds later, approach notified us spacing wasn't going to work out and gave us a heading of 040 degrees for runway 12L. Just then we got a TCASII TA and noticed a DC9 approximately 1000 ft above us, descending and turning to final for runway 12R. We turned away and began a gradual descent. After the aircraft passed just behind us, we got a momentary TCASII RA 'descend, descend' and then a 'clear of conflict.' flight continued normal for uneventful landing to runway 12L. The involved factors were approach control and pilot communication factors. Multiple same type aircraft approaching same airport. High workload environment for both approach controller and pilots. WX was clear so reduced spacing for arrs.

Original NASA ASRS Text

Title: FLT CREW OF A319 RPTS FOLLOWING A TCASII RA AFTER MSP TWR MISJUDGED THE SPACING BTWN THEM AND ANOTHER ACFT INTENDING TO USE THE SAME RWY.

Narrative: ON BASE TO RWY 12R, MSP CALLED RWY IN SIGHT. NOTIFIED OF DC9 TFC AT 1 O'CLOCK POS ON 1 MI FINAL TO RWY 12R. RPTED TFC INSIGHT. CLRED VISUAL APCH RWY 12R. A FEW SECONDS LATER, APCH NOTIFIED US SPACING WASN'T GOING TO WORK OUT AND GAVE US A HDG OF 040 DEGS FOR RWY 12L. JUST THEN WE GOT A TCASII TA AND NOTICED A DC9 APPROX 1000 FT ABOVE US, DSNDING AND TURNING TO FINAL FOR RWY 12R. WE TURNED AWAY AND BEGAN A GRADUAL DSCNT. AFTER THE ACFT PASSED JUST BEHIND US, WE GOT A MOMENTARY TCASII RA 'DSND, DSND' AND THEN A 'CLR OF CONFLICT.' FLT CONTINUED NORMAL FOR UNEVENTFUL LNDG TO RWY 12L. THE INVOLVED FACTORS WERE APCH CTL AND PLT COM FACTORS. MULTIPLE SAME TYPE ACFT APCHING SAME ARPT. HIGH WORKLOAD ENVIRONMENT FOR BOTH APCH CTLR AND PLTS. WX WAS CLR SO REDUCED SPACING FOR ARRS.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.